Answer:
<em>D.) state of matter</em>
Explanation:
it can undergo chemical but not nuclear.
naturally occurring radioactive elements have been around since the Earth's formation
B. Asteroids have a nearly circular orbit.
Answer:Although the nervous system is very complex, nervous tissue consists of just two basic types of nerve cells: neurons and glial cells Neurons are the structural and functional units of the nervous system They transmit electrical signals, called nerve impulses. Glial cells provide support for neurons.
Explanation:
